JP3609184B2 - PHOTO FILM, FILM UNIT WITH LENS, AND METHOD FOR PRODUCING FILM UNIT WITH LENS - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a photographic film provided with two perforations for frame advance control per photographing frame, a lens-fitted film unit using the same, and a method of manufacturing a lens-fitted film unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a lens-fitted photo film unit has a built-in film winding mechanism, a film winding stop mechanism, and a shutter mechanism. Photo film cartridges are loaded in advance in a form in which photographic films drawn out from the cartridges into rolls are stored in the chambers. In this photographic film, perforations are formed at predetermined intervals.
[0003]
The film winding mechanism is composed of a winding knob partially exposed to the outside and rotatable at the upper part of the cartridge storage chamber, and a transmission means for transmitting the rotation to the spool of the cartridge stored in the cartridge storage chamber. The photographed film is stored in the cartridge by the film winding operation.
[0004]
The film winding mechanism is provided with blocking means for blocking the rotation of the driven sprocket and the rotating operation of the winding knob by transferring the film for one frame, and this blocking means is intended to make it easy to block the rotation of the winding knob. Located near the cartridge storage room. For this reason, the driven sprocket is engaged with the perforation at a position closer to the cartridge storage chamber than the center of the exposure screen. The state where the rotation of the driven sprocket is blocked is a state where the teeth of the driven sprocket are engaged with the perforations in order to prevent the photographic film from moving during the exposure.
[0005]
The shutter mechanism is charged by moving the shutter blades to the charge position against the bias of the spring, and the shutter charge is charged by using the force that the driven sprocket rotates during the film transfer for one frame. Do. For this reason, the shutter charge is performed by using the rotational force of the driven sprocket while the teeth of the driven sprocket and the perforations are engaged so as not to lose the bias of the spring.
[0006]
The lens-fitted photo film unit is shipped from the assembly factory without charging the shutter mechanism so that the shutter release is not performed due to vibration during transportation. For this reason, the purchased user first performs a film charge operation to perform shutter charge. As a result, a frame (final frame) on the final end side of the film is set in the exposure opening. Thereafter, shooting is performed sequentially from the frame on the rear end side of the film, and the film up to the front end of the photo film is stored in the cartridge by the film winding operation after the shooting is completed on the frame on the most advanced side (first frame).
[0007]
By the way, Japanese Patent Application Laid-Open No. 5-19368 proposes a photographic film in which a non-photographing area is provided at the front and rear ends of the film, and a perforation is provided in an arrangement between the two in the photographing area between them. Yes. Among these, a pair of perforations for frame advance control arranged at short intervals from the front end side are arranged for the number of frames taken for each frame feed length, and the front end side of the pair of perforations corresponding to the last frame There is known a photographic film in which one perforation is provided corresponding to the end of the last frame at a position separated from the perforation by one frame feeding length. Explaining in detail the arrangement of the perforations of this photographic film, the perforations alternate in two different intervals in the shooting area: a long interval for determining the length of one frame and a short interval for determining the mutual interval between frames. A single perforation is provided in the non-photographing area on the film front side at a short interval from the film perforation in the filming area, so that the first from the film front side is short and the last is It is configured as an array with long intervals.
[0008]
Considering the use of such a photographic film in the lens-fitted photo film unit described above, this can be achieved by using an intermittent sprocket in which teeth are arranged in accordance with two types of perforations. According to this, since the intermittent sprocket is provided at a position close to the cartridge storage chamber side with respect to the photographing optical axis, the perforation on the cartridge storage chamber side is used for frame positioning. Since it is necessary to complete the shutter charge until the positioning perforation is engaged with the teeth of the intermittent sprocket, the perforation on the film winding direction side (the film rear end side) of the positioning perforation is related to What is necessary is just to perform shutter charge using the force which an intermittent sprocket rotates during a match. Therefore, when a photographic film is employed in a lens-fitted photo film unit, a pair of perforations arranged at short intervals are used for frame advance control.
[0009]
[Problems to be solved by the invention]
However, in the above-described film unit with a lens, since photography is performed in order from the rear end side of the photographic film, perforations arranged at long intervals at the beginning of film winding reach the sprocket and shoot the prescribed number of images in the photographing area. I can't do it. Therefore, in order to shoot a specified number of images in the shooting area, the frame on the rear end side of the film in the shooting area of the photographic film is engaged with the teeth of the intermittent sprocket, that is, the shutter charge is completed. Will be shipped. For this reason, as described above, there is a possibility that a problem that shutter release is performed during transportation may occur.
[0010]
The present invention is for solving the above-mentioned problems, and has a mechanism unique to a lens-fitted photo film unit.DependenceAn object of the present invention is to provide a photographic film that eliminates the problems that occur and to provide a lens-fitted photo film unit that eliminates problems caused by using the photographic film and a method of manufacturing the same.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the photographic film of the present invention, a pair of perforations for frame feed control arranged at a short interval from the front end side is locked to a spool incorporated in a cartridge and arranged at a short interval. A pair of additional perforations corresponding to the end of the last frame at a position separated from the leading perforation by one frame feeding length among the pair of perforations corresponding to the last frame, arranged for each feeding length. Is provided. The frame advance control here includes shutter charge. According to this, it becomes the form of a pair of pairs in which the arrangement of perforations is always arranged at short intervals.
[0012]
In the case of a film unit with a lens that is configured to detect a pair of perforations for frame advance control at a predetermined position closer to the cartridge storage chamber side than the shooting optical axis, the first frame (the last frame in the film unit with a lens) A pair of perforations at the foremost end of the photographic film is detected by winding the film after shooting at (position), and film winding is stopped here, so that the entire film end cannot be stored in the cartridge. Arise. there,A pair of perforations at the very top of the photo film is disabled in the counter.
[0013]
On the other hand, in the case of a lens-fitted film unit having a structure for detecting a pair of perforations for frame advance control at a predetermined position closer to the film roll chamber side than the photographing optical axis, a pair of additional perforations is formed by the first film winding. It is detected that the camera has moved to the specified position, and a non-photographing area is set at the exposure opening that is one frame closer to the rear edge of the film than the last frame (first frame position of the lens-fitted photo film unit) However, there is a problem that one more image is taken. For this reason, LesIn the manufacturing process of the film unit with a window, after the film is wound up, the shutter mechanism is operated to check the operation thereof, and the non-photographed area is wound up in advance and then shipped. Thereby, the final frame can be set at the exposure opening by the user's initial film winding.
[0014]
Also,When the film winding means detects that a pair of additional perforations are in place, the film winding is disabled.It is desirable to make it. In this way,Since the film winding means detects that the second and subsequent pairs of perforations have come, and performs film winding, the final frame can be set at the exposure opening by the first film winding.
[0015]
In addition, in the case of a lens-fitted film unit configured to detect a pair of perforations for frame advance control at a predetermined position closer to the film roll chamber side than the photographing optical axis, the film is wound up for one frame in advance during the manufacturing process. Since this is done, it is possible to store all of the film front end in the cartridge by winding the film after shooting at the last frame position (first frame on the front end side of the photographic film). In this caseThe mostWhen the subsequent frame position is set, the frame number counter is displaced to the display position where the remaining number is 1, and the frame is moved to the display position indicating that there is no remaining number by winding the film after completing the shooting at the last frame position. The number counter may be displaced.
[0016]
If a commercially available photographic film is used as it is for a lens-fitted photo film unit, it may be used by illegally refilling the used photo film. A device to prevent it is necessary. there,oneLarge perforation with a certain size of the perforation on the front end of the pair of perforationsIt is preferred to form.By increasing the perforation, the sprocket teeth corresponding to the perforations are changed to large teeth. For this reason, the standard size perforations of commercially available photographic films do not match the size of the large teeth, thus preventing refilling.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the photographic film 10 with a patrone is composed of a patrone 12 in which a spool 11 is rotatably accommodated, and a photographic film 13 in which a film rear end 13a is detachably locked to the spool 11. The photographic film 13 is fed out from the film tip 13b by rotating the spool 11 in the film feeding direction. The photographic film 13 is composed of a non-photographing area provided on each of the film leading end 13b side and the film trailing end 13a side, and a photographing area provided therebetween. It is the length according to. In this photographic film 13, the surface shown in the figure is a surface coated with a photosensitive emulsion, and a transparent magnetic recording layer is coated on the support surface side opposite to this surface. In this magnetic recording layer, information on the prescribed number of images is magnetically recorded in advance.
[0018]
In the photographing area, perforations 14 of the same size are alternately arranged at two edges L1 and L2 along the film feeding direction at one edge in the film width direction, and the perforations 14 having a long interval L2 are arranged. The center is set in a state where it is aligned with the center (photographing optical axis) in the film feeding direction (longitudinal direction) of the exposure opening of the camera, and the frame 15 is formed in the range indicated by the two-dot chain line in FIG. The long interval L2 of the perforation 14 is for determining the length of each frame, and the short interval L1 is for determining the mutual interval of each frame. The one-frame feed length is an interval L1 + L2.
[0019]
The photographic film cartridge 10 is photographed by a general camera and then submitted to a developing station, where it is set in an automatic developing and printing apparatus. In the automatic developing and printing apparatus, after the spool 11 is rotated in the film feeding direction and the photographic film 13 is fed out from the film leading end 13b, a tongue-like member is inserted to unlock the film trailing end 13a from the spool 11. Then, only the photographic film 13 is conveyed inward and developed. Thereafter, the print processing is performed by feeding one frame at a time.
[0020]
In the one-frame feeding control of the automatic developing and printing apparatus, the perforation 14 on the film leading end 13b side out of two perforations 14 per one frame is positioned at the print position. Further, in order to improve the processing speed, the photographic film 13 is fed at a high speed from the film tip 13b, and the perforation 14 is detected by, for example, an optical sensor, so that the film tip 13b of the odd-numbered perforations counted from the film tip. When the side edge is detected, the film feeding speed is switched from high speed to low speed, and after detecting the edge on the film leading edge 13b side of the next even-numbered perforation, the film feeding is performed by detecting the edge on the film trailing edge 13a side. Is stopped and the frame 15 is controlled to be positioned at the print position.
[0021]
In order to use such one-frame feed control, if the perforation 14 is provided only in the shooting area, the frame 15 cannot be correctly positioned at the print position. Therefore, in the commercially available photographic film 13, one perforation 16 of the same size is formed in advance at a position separated by a short interval L1 from the perforation 14a located on the film leading end 13b side in the non-photographing area on the film leading end 13b side. ing. Thereby, the center of the long interval L2 of the perforation 14 can be aligned with the center of the printing position (the optical axis of the printing lens). In the automatic developing and printing machine, after the information is read from the magnetic recording layer and the specified number of images are printed, the rear end 13a of the film is again locked to the spool 11 and the developed photographic film 13 is attached to the cartridge 12. Store. At the developing station, the cartridge 12 after the printing process is taken out, and the printed photograph is returned to the user together with the cartridge 12.
[0022]
When the photographic film 10 with a cartridge used in such a printing system is used in a film unit with a lens, one perforation 17 is formed in a non-photographing area on the film rear end 13a side. As shown in FIG. 4B, this position is a position separated from the perforation 14b on the film rear end 13a side of the photographing region by a short interval L1 toward the film rear end 13a. Therefore, a pair of perforations 14 and 16 arranged at a short interval L1 are arranged by the number of frames to be photographed. Further, in the arrangement of perforations 14 and 16, the rear end side of the film further from the pair of perforations 14 on the rear end side of the film. A pair of additional perforations 14b and 17 are arranged at positions spaced apart by a short distance L1. As a result, the arrangement of the perforations 14, 16, and 17 is all arranged at a short interval L1, and a predetermined number of images can be taken within the photographing region, and the automatic developing and printing machine one frame feed control is used as it is. In addition, the shutter charge can be reliably performed by the first film winding operation. The perforation 17 is the same size as the perforation 14.
[0023]
【Example】
FIG. 2 shows the appearance of the lens-fitted photo film unit 18 having a structure for detecting the pair of perforations 14, 16, and 17 of the photographic film 13 at a predetermined position closer to the cartridge housing chamber side than the photographing optical axis. . The lens-fitted photo film unit 18 includes a unit main body 19 in which a photographic film cartridge 10 and various photographing mechanisms are incorporated, and a paper box 20 that houses the unit main body 19. The paper box 20 has an outline that exposes a winding knob 21, a shutter button 22, and the like incorporated in the unit body 19, and also exposes the photographing lens 23, the finder 24, the number of photographing display window 25, and the like. A hole is provided.
[0024]
As shown in FIG. 3, the unit main body 19 includes a main body base 26, a rear cover 27, an exposure unit 28, and a front cover 29. An exposure unit 28 is detachably attached to the front surface of the main body base 26. The exposure unit 28 incorporates an exposure imparting mechanism including a photographing lens 23, a film winding mechanism, a finder optical 28a, a shutter charge mechanism, and the like, which are unitized. The rear cover 27 is detachably attached to the back of the main body base 26 and stores the photographic film 10 with a cartridge in a light-tight manner between the rear cover 27 and the main body base 26.
[0025]
The front cover 29 is detachably attached to the front surface of the main body base 26. On the upper surface of the front cover 29, there is provided a shutter button 22 which is cut out and elastically formed. A pressing rod 30 is provided below the shutter button 22, and in detail, a component of an exposure unit 28, which will be described later, is pressed to operate the exposure imparting mechanism.
[0026]
The main body base 26 is integrally formed with a cartridge storage chamber 31 for storing the cartridge 12 and a film roll chamber 32 for storing the unexposed photographic film 13 drawn out from the cartridge 12 in the form of a film roll 13c. Has been. In this embodiment, the film roll 13 c is wound around the core 33. The upper and lower ends of the winding core 33 are rotatably supported inside the film roll chamber 32 by a pair of forks 27a provided on the rear cover 27, so that the photographic film 13 and the film core 13 can be naturally formed during the final film winding operation. Is disengaged. The core 33 may be omitted, and only the film roll 13c may be stored in the film roll chamber 32. In this case, the pair of forks 27a can be omitted.
[0027]
The bottoms of the cartridge storage chamber 31 and the film roll chamber 32 are opened, and after the photographic film 10 with a cartridge is loaded, they are closed by pull-top type bottom covers 34 and 35 provided on the rear cover 27, respectively. The bottom lid 34 is a lid for taking out the cartridge 12 containing the photographed photographic film 13.
[0028]
A dark box 36 is provided between the cartridge storage chamber 31 and the film roll chamber 32. An exposure opening is formed on the back side of the dark box 36. The exposure aperture has a curved shape centered on the optical axis 23a passing through the photographing lens 23 together with the film surface passing therethrough. The rear cover 27 is formed with a film support surface 37 at a portion facing the film surface. The film support surface 37 is also curved in the same manner as the film surface. Note that the dark box 36 may be provided in the exposure unit 28. Further, the dark box 36 may be formed by dividing the dark box 36 and providing a part to the exposure unit 28, the other part to the main body base 26, and the exposure unit 28 to the main body base 26.
[0029]
On the front side of the dark box 36, an opening 38 for guiding subject light transmitted through the photographing lens 23 to the exposure opening is formed. Further, an opening 39 for exposing an intermittent sprocket 52, which will be described later in detail, toward the photographic film 13 is formed above the dark box 38. This opening 39 is formed on the upper left side with respect to the exposure opening viewed from the photographing lens 23 side, that is, at a position close to the cartridge housing chamber 31 side with respect to the photographing optical axis 23a.
[0030]
The winding knob 21 is rotatably disposed on the upper surface of the cartridge storage chamber 31. The winding knob 21 is integrally formed with a shaft that engages with the spool 11 of the cartridge 12 loaded in the cartridge storage chamber 31. This shaft constitutes a film winding mechanism together with the winding knob 21. A part of the winding knob 21 is exposed from the opening 40 of the rear cover 27. By rotating the exposed part counterclockwise in the drawing, the spool 11 is driven and rotated, and the photographed photograph is taken. The film 13 is transported in the film winding direction in which the film 13 is accommodated in the cartridge 12.
[0031]
A tooth row 21 a is formed on the outer periphery of the winding knob 21. A check claw 41 provided on the main body base 26 is engaged with the tooth row 21a. The check claw 41 prevents the photographic film 13 from being sent out in the direction opposite to the film winding direction.
[0032]
The exposure unit 28 is provided with a film counter mechanism in addition to the exposure applying mechanism, the film winding stop mechanism, and the shutter mechanism. As shown in FIG. 4, these mechanisms are sequentially inserted into a shaft 47 and a shutter drive lever 45, a number display plate 46, which are sequentially inserted into a shaft 44 formed on the upper surface of the base plate 43 constituting the dark box 36. A torsion spring 48, a locking lever 49, a rotating member 51 inserted into the bearing opening 50, an intermittent sprocket 52, a leaf spring 53, and a shutter blade 54. Reference numeral 21 b denotes a shaft that connects the winding knob 21 and the spool 11.
[0033]
The intermittent sprocket 52 is engaged with the lower part of the rotating member 51 and exposed from the opening 39 described above toward the film surface. On the circumferential surface 52a of the intermittent sprocket 52, as shown in detail in FIG. 5, a pair of teeth 56 and 57 that sequentially mesh with a pair of perforations 14 arranged at short intervals L1 are provided on the circumferential surface 52a. Two pairs are provided with rotational symmetry of °, and half-rotate following the film transport for one frame feeding length. The length of the circumferential surface 52a is preferably the same as or shorter than the one-frame feeding length of the photographic film. The driven direction of the intermittent sprocket 52 is the counterclockwise direction shown in the figure, that is, the rotational direction along the film winding direction. In addition, the code | symbol 36a shown in FIG. 5 has shown exposure opening.
[0034]
The rotating member 51 includes a pressed portion 60, a shutter charge cam 61, a winding stop cam 62, and a two-tooth gear 63 from below, and these are integrally formed. A pair of protrusions 60 a to which the urging force of the leaf spring 53 is transmitted to the pressed part 60 rotate 180 °.SymmetryWhen the circumferential surface 52a between the pair of teeth 56, 57 having a wide interval is opposed to the photographic film 13, the protrusion 60a is pressed by the urging of the leaf spring 53, and the rotating member 51 is pressed. Rotate in the driven direction along the winding direction. As a result, the teeth 56 and 57 of the intermittent sprocket 52 are moved to positions where they can mesh with the next perforation 14. A pair of cams 61a are formed on the shutter charge cam 61 with a 180 ° object, and one end 45c of the shutter drive lever 45 enters the rotation locus.
[0035]
One end 48 a of the torsion spring 48 is hooked on the spring receiver 45 a of the shutter drive lever 45 and urges it toward the counterclockwise direction (release completion position). It is hooked on the piece 49d and biased in the clockwise direction (winding position). In the locking lever 49, the claw portion 49 a is in contact with the outer periphery of the winding cam 62 by the urging force of the torsion spring 48. When the rotating member 51 is rotated halfway by winding the photographic film 13 for one frame feeding length, the shutter drive lever 45 is rotated clockwise (charge position) by the shutter charge cam 61.
[0036]
Further, each time the rotating member 51 is rotated halfway, the pawl portion 49a matches the groove 62a of the winding cam 62, so that the locking lever 49 is slightly rotated clockwise by the urging of the torsion spring 48. . When the locking lever 49 is rotated in the clockwise direction, the lower protrusion 49b of the locking lever 49 enters the rotation locus of the rising piece 45a of the shutter driving lever 45 and holds the shutter driving lever 45 in the shutter charge position. . At this time, the winding pawl 49c of the locking lever 49 is engaged with the tooth row 21a on the outer periphery of the winding knob 21 to prevent the film winding operation.
[0037]
The two-tooth gear 63 is also half-rotated by the half-rotation of the rotating member 51, and this causes the sheet number display plate 46 to move clockwise by one scale. On the upper surface of the number display plate 46, a scale for displaying the number is provided corresponding to the rotation pitch. This scale is the number of films that can be photographed at that time, that is, the remaining number display scale. By observing this scale through the display window 25, the number of remaining frames can be confirmed.
[0038]
When the shutter button 22 is pressed, the pressing rod 30 presses the falling piece 49d of the locking lever 49 to rotate it counterclockwise (winding release position). As a result, the engagement between the lower protrusion 49 b of the locking lever 49 and the rising piece 45 a of the shutter drive lever 45 is released, so that the shutter drive lever 45 is counterclockwise by the bias of the torsion spring 48. Rotate. At this time, the kicking arm 45b of the shutter drive lever 45 kicks the shutter blade 54 that is swingably assembled to the shaft 65 and rotates it clockwise in the figure. As a result, the shutter opening 67 is opened, and the photographic film 13 is exposed. Further, the shutter blade 54 is rotated counterclockwise by the urging of the pull-back spring 66, and immediately closes the shutter opening 67.
[0039]
When the locking lever 49 is rotated counterclockwise, the winding pawl 49c is retracted from the tooth row 21a, and the pawl portion 49a is retracted from the groove 62a, so that the next film winding operation is allowed. When the winding knob 21 is rotated in the film winding direction (counterclockwise), the rotating member 51 is rotated halfway as described above, and the shutter charge and the increment of one scale are performed.
[0040]
When photographing is repeated as described above and photographing of the first frame 15a of the photographic film 13 is completed, a mechanism for invalidating the pair of perforations 14a and 16 at the foremost side of the photographic film 14 is required. This mechanism includes a cam 46 a formed on the lower surface of the number display plate 46 and a rising protrusion 49 e provided on the locking lever 49. The perforations 14a and 16 reach the intermittent sprocket 52 by the final hoisting operation after the first frame 15a has been photographed, and the intermittent sprocket 52 is rotated halfway. By this rotation, the number display board 46 advances to a position where the completion of photographing is displayed. At this time, the cam 46 a enters the turning locus of the rising protrusion 49 e of the locking lever 49 by the step of the number display plate 46. As a result, the locking lever 49 is held at the film storage allowable position between the winding stop position and the winding release release position.
[0041]
At the film storage allowable position, the claw portion 49a of the locking lever 49 is retracted from the groove 62a of the winding cam 62, and the winding claw 49c is retracted from the tooth row 21a of the winding knob 21. 49b enters the rotation trajectory of the rising piece 45a of the shutter drive lever 45, and the shutter drive lever 45 is held in the charge position. As a result, the operation of the film winding stop mechanism is invalidated, the rotation of the winding knob 21 in the film winding direction becomes free, and the operation of the shutter mechanism is disabled, so that the subsequent film winding operation is performed. Thus, the entire photographic film 13 can be stored in the cartridge 12 without performing exposure.
[0042]
Next, the operation of the above embodiment will be described. The photographic film cartridge 10 is loaded by storing the cartridge 12 in the cartridge storage chamber 31 and the film roll 13c drawn out from the cartridge 12 in a roll shape and stored in the film roll chamber 32, respectively. The photographic film 13 is pulled out by the amount corresponding to the last frame 15b designated as the photographing area to be set in the exposure opening 36a, and then pulled out by a length exceeding the short interval L1 of the perforation 14. At this time, the intermittent sprocket 52 is set at a rotational position where the circumferential portion 52a between the teeth 57 and 56 arranged at long intervals faces the photographic film 13 and the shutter charge is not completed. As a result, the photo film cartridge 10 can be smoothly loaded without the teeth 56 and 57 of the intermittent sprocket 52 sticking to the photo film 13. Further, since the shutter charge of the shutter mechanism is not completed in the state of the intermittent sprocket 52, the shutter release is not performed even if the shutter button 22 is pressed due to vibration during transportation by shipping as it is.
[0043]
A user who has purchased the lens-fitted photo film unit 18 first rotates the winding knob 21 to prepare for shooting. The photographic film 13 is wound up into the cartridge 12 by rotating the winding knob 21. At this time, the intermittent sprocket 52 is in a state in which the teeth 56 and 57 and the perforation 14 are not meshed at all, and is biased in the driven direction by the leaf spring 53, and therefore the driven direction of the pair of teeth 56 and 57. The side face of the leading tooth 56 on the side is in contact with the photographic film 13, and only the photographic film 13 is slipped and transferred.
[0044]
By continuing the film winding operation, the perforation 17 in the non-photographing area among the additional perforations 17 and 14 b is transferred toward the intermittent sprocket 52. As a result, the leading tooth 56 of the intermittent sprocket 52 meshes with the perforation 17, and the subsequent tooth 57 aligned at a short interval meshes with the transfer of the perforation 14 b on the film rear end 13 a side of the final frame 15 b. .
[0045]
Due to the rotation of the intermittent sprocket 52 during this period, the shutter charge cam 61 rotates the shutter drive lever 45 toward the charge position in the clockwise direction against the bias of the torsion spring 48. Then, the claw portion 49a enters the groove 62a of the winding cam 62 and rotates the intermittent sprocket 52 by rotating to the position where the subsequent teeth 57 are reliably engaged with the perforation 14b, that is, the half rotation position of the intermittent sprocket 52. To prevent. The rotation of the locking lever 49 at this time causes the lower protrusion 49b to enter the turning locus of the rising piece 45a of the shutter drive lever 45 to hold the shutter drive lever 45 in the charging position, and the winding pawl 49c winds up. Engage with the tooth row 21 a of the knob 21 to prevent the winding knob 21 from rotating. As a result, the final frame 15b designated as the imaging region is set in the exposure opening 36a.
[0046]
Thereafter, the photographing range is confirmed by looking through the eyepiece window 27b of the rear cover 27, and when the shutter button 22 is pressed, the pressing rod 30 falls and presses the piece 49d to move the locking lever 49 counterclockwise (anti-winding release position). ) Rotate toward. As a result, the contact between the lower protrusion 46 b of the locking lever 49 and the rising piece 45 a of the shutter drive lever 45 is released, so that the shutter drive lever 45 is counterclockwise by the bias of the torsion spring 48. Rotates and kicks the shutter blade 54. As a result, the shutter opening 67 is opened, and the photographic film 13 is exposed. Further, the shutter blade 54 is rotated counterclockwise by the urging of the pull-back spring 66, and immediately closes the shutter opening 67.
[0047]
When the photographing is finished, the rising piece 45a enters the rotation locus of the lower protrusion 49b, and the shutter drive lever 45 holds the locking lever 49 in the anti-winding position. For this reason, the winding pawl 49c of the locking lever 49 is retracted from the tooth row 21a, and the pawl portion 49a is retracted from the groove 62a, so that the next film winding operation is allowed. Thereafter, when the winding knob 21 is rotated in the film winding direction (counterclockwise direction), the rotating member 51 is rotated halfway as described above, and the shutter charge and the rotation of one scale of the number display plate 46 are performed.
[0048]
If the number of frames counted from the film tip 13b side of the frame 25 is "X" with respect to the frame 15 positioned at the exposure opening 36a by repeating the photographing and film winding operation as described above, the film tip 13b The teeth 57 of the intermittent sprocket 52 are engaged with the 2X + 1-th perforations 16, 14, 17 counted from the side, and film winding is performed. The order of exposure is performed from the last frame 15b to the first frame 15a in the shooting area, and the position where the remaining number “1” is displayed on the number display board 46 after the shooting of the first frame 15a is completed. It is progressing to. The perforations 14a and 16 arrive in order by the subsequent film winding operation. The intermittent sprocket 52 is rotated by these perforations 14a and 16, and the number display plate 46 advances by one scale to indicate the completion of photographing. With this step, the cam 46a of the number display plate 46 enters the rotation locus of the rising protrusion 49e of the locking lever 49, and holds the locking lever 49 in the film storage allowable position. As a result, the operations of the film winding stop mechanism and the shutter mechanism are invalidated, and the winding knob 21 can be freely rotated in the film winding direction, so that the film winding operation is continued, and all the photographic films 13 are in the cartridge. 12 is caught inside.
[0049]
The photographed film unit 18 with a lens is submitted to the developing laboratory as it is. At the developing station, the bottom lid 34 is opened, the cartridge 12 containing the photographed photographic film 13 is taken out, and the cartridge 12 is set in an automatic developing and printing apparatus. In the automatic developing and printing apparatus, after the spool 11 is rotated in the film feeding direction and the photographic film 13 is fed out from the film leading end 13b, a tongue-like member is inserted to unlock the film trailing end 13a from the spool 11. Then, only the photographed photographic film 13 is conveyed inward to be developed. Thereafter, the print processing is performed by feeding one frame at a time.
[0050]
The one-frame feeding control of the automatic developing and printing apparatus feeds the photographic film 13 from the film leading edge 13b at a high speed, and the edge of the odd-numbered perforations 16, 14 counted from the film leading edge 13b on the film leading edge 13b side is an optical sensor or the like. The film feeding speed is switched from the high speed to the low speed when the film is detected in step S1, the film feeding edge is detected by detecting the edge of the next even-numbered perforation 16, 14 on the film leading edge 13b side, and then detecting the edge on the film trailing edge 13a side. Is stopped and each frame 15 is positioned at the print position. That is, at the time of printing, perforation positioned on the right side of the printing optical axis with respect to each frame 15 is used for frame advance control.
[0051]
In this automatic developing and printing apparatus, the number of times of printing is counted, and a predetermined number of pieces of information are read from the magnetic recording layer. Thus, the printing is completed by printing a predetermined number of sheets. Thereafter, the rear end 13a of the film is again engaged with the spool 11, and the developed photographic film 13 is stored in the cartridge 12. The cartridge 12 is returned to the user together with the print photo. As described above, in the one-frame feeding control of the automatic developing and printing apparatus, since the printing is completed by performing the printing for the specified number of sheets, the perforation 14b and the perforation 17 are not used. The perforation 17 provided in FIG. 5 does not give trouble to the print processing.
[0052]
In the above embodiment, the perforations 16, 14, and 17 are all the same size. However, the present invention is not limited to this, and different sizes can be used as long as the one-frame feed control of the automatic developing and printing apparatus can be used as it is. Good. For example, in the photographic film 70 shown in FIG. 6, two large and small perforations 72 having different sizes are arranged alternately in the photographing region at two types of intervals L1 and L2, and the large perforation 72a is assigned to the designated frame 15. The small perforation 72b is arranged in the upper right with respect to the range of the frame 15, and the small perforation 72b is arranged in the upper right with respect to the range of the frame 15. The small perforation 72b has the same size as the perforation 14 described in FIG.
[0053]
A large perforation 73 at the film front end 70a is obtained by processing a perforation 16 formed in advance on a commercially available photographic film, and a small perforation 74 at the film rear end 70b is newly added for the film unit 18 with a lens. It is what.
[0054]
The large perforations 72a and 73 are longer than the small perforations 72b and 74 along the direction of the film rear end 70b by a length L4 along the film rear end 70b side. That is, the large perforations 72a and 73 shift the position of the edge on the film rear end 70b side of both edges along the film feeding direction toward the film rear end 70b. Accordingly, the position of the edge on the film leading edge 70a side used for frame advance control during printing does not change. For this reason, with respect to the center of each frame 15, the distance to both edges on the film front end 70a side and the film rear end 70b side of the upper right small perforation 72b and the edge on the film front end 70a side of the large perforation 72a located on the upper left The distance up to is the same as that of the photographic film 13 described with reference to FIG. Both perforations 72 have the same length in the film width direction.
[0055]
When such a photographic film 70 is used for the lens-fitted film unit 18, the size of the teeth of the intermittent sprocket may be determined in accordance with the size of the perforation 72. According to this, it is possible to prevent an illegal act such that a third party refills and uses a photographic film 70 in a used lens-fitted film unit 18.
[0056]
Moreover, you may employ | adopt the intermittent sprocket 80 as shown to FIG. 7 (A), (B). The intermittent sprocket 80 is provided with two pairs of large and small teeth 81 and 82 that are sequentially engaged with a pair of perforations 72a and 72b arranged at short intervals at positions of 180 ° rotation target on the circumferential surface 80a. Structure. The large tooth 81 has a thinned portion 83 formed therein, and is connected to the circumferential surface 80a of the intermittent sprocket 80 at one end 81a. The wall thickness of the one end 81a is thin, and when the large tooth 81 is cut so that it can mesh with the perforation of a commercially available photographic film, the one end 81a of the large tooth 81 is broken and the circumferential surface 80a is cut. Therefore, unauthorized refilling of photographic film can be surely prevented.
[0057]
In addition, when the intermittent sprocket 80 is molded from an elastic resin, the large teeth 81 can be elastically deformed around the one end 81a. For this reason, for example, when the small tooth 82 fails to mesh with the small perforation 72b and meshes with the large perforation 72a, the large tooth 81 does not have meshing perforation, so even if it hits the plane of the photographic film 13 in the figure. As shown by a two-dot chain line, the large teeth 81 are elastically deformed so as to enter the interior of the intermittent sprocket 80 around the one end 81a, so that the photographic film 70 is not damaged or damaged.
[0058]
In the present invention, the size may be changed to a shape other than perforation as in the embodiment described in FIG. In this case, the automatic developing and printing apparatus can be used as it is for one-frame feeding control. That is, the edge on the film front side is set at a predetermined distance from the top of the film for the odd-numbered perforations counted from the film tip, and the edge in the film feeding direction is set for the even-numbered perforations. Just keep it. Further, in the above-described film winding mechanism of the lens-fitted photo film unit 18, film winding is performed by half rotation of the intermittent sprockets 56, 80. However, the present invention is not limited to this, and film winding is stopped by one rotation. May be performed. In this case, one of the teeth 56, 57, 81, 82 of the intermittent sprockets 56, 80 provided in the pair and the groove 62a, the cam 61, and the protrusion 60a provided in the rotating member 51 can be omitted.
[0059]
FIG. 8 shows a unit main body 90 structured to detect a pair of perforations 14, 16, and 17 for frame advance control at a predetermined position closer to the film roll chamber 32 side than the photographing optical axis 23a. The main body base 91 is provided with an opening 93 that exposes the intermittent sprocket 52 toward the passage of the photographic film 13 at a position closer to the film roll chamber 32 than the photographing optical axis 28a. As the position of the intermittent sprocket 52 is changed, the exposure unit 94 is disposed at a position where the film winding mechanism, shutter mechanism, film counter mechanism, and the like are closer to the film roll chamber 32 side than the photographing optical axis 28a. The finder optical 94a is disposed at a position closer to the cartridge storage chamber 31 than the photographing optical axis 28a.
[0060]
As shown in FIG. 9, the structure of the exposure unit 94, such as a film winding mechanism, a shutter mechanism, and a film counter mechanism, is the same as that described in FIG. The difference is that since the locking lever 49 is away from the winding knob 21, the winding pawl 49 c of the locking lever 49 is elongated and bent to escape the finder optical 94.
[0061]
Further, since the intermittent sprocket 52 detects the pair of perforations 14, 16, and 17 at a predetermined position closer to the film roll chamber side than the photographing optical axis 23a, as shown in FIG. 10, the first frame 15a is photographed. In the process of film winding after the perforation, perforation does not reach. Therefore, all of the film leading end 13b can be stored in the cartridge 12 by this final winding operation. In this case, when the first frame 15a is set in the exposure opening 36a, the number display plate 95 shown in FIG. 9 rotates to the position where the remaining number of sheets is displayed on the display window 25 so that “1” is displayed. The photographic film 13 is transferred by winding the film after the photographing is completed in 15a, and the number display plate 95 is rotated to a display position indicating that the remaining number is not in the display window 25 by a slight rotation of the sprocket 52 at this time. Just keep it. Therefore, the cam 46a described with reference to FIG.
[0062]
Further, in this film unit with a lens, the pair of perforations 14, 16, and 17 are detected by the sprocket 52 at a predetermined position closer to the film roll chamber side than the photographing optical axis 23a. When it is detected that 17 and 14b have moved to a predetermined position, a non-photographing area that is shifted by one frame is set at the rear end side of the film from the last frame 15b at the exposure opening, which is one more than the specified number of sheets. There is a problem of shooting. For this reason, in manufacturing the lens-fitted photo film unit, the shutter inspection is performed after the photographic film 13 is loaded.
[0063]
In the shutter inspection process, film winding is performed to set the non-photographing area in the exposure opening 36a, and then shutter release is performed. At this time, it is desirable to inspect the operation of the shutter mechanism so that the non-photographing area set in the exposure opening 36a is not exposed.
[0064]
Therefore, as a shutter inspection, for example, near-infrared laser light is incident on the photographing lens 23 in a dark room, and the light reflected by the shutter blades 54 at the back is received by the light-receiving unit, and the reflected light is received. The oscillation speed of the shutter blade 54 was inspected by measuring the time that was not present. According to this, since infrared light is used, the photographic film is not exposed. Then, the product is shipped in the state after the shutter release is completed. As a result, when the user rolls up the first film, the second pair of perforations 14 is detected by the sprocket 52 and the final frame 15b is set in the exposure opening 36a.
[0065]
The lens-fitted photo film unit described with reference to FIGS. 8 to 10 is shipped in a state where the film has been wound up for one frame in the manufacturing process, and a predetermined number of pictures are taken. For example, a film winding mechanism is adopted in which film winding is disabled for the pair of additional perforations 17 and 14b sent by the first film winding, and film winding is performed in order from the second pair of perforations 14. May be. As this mechanism, for example, a cam is provided on the lower surface of the number display plate 95 described above, and the cam is raised at the rotation position of the number display plate 95 when the pair of additional perforations 17 and 14b are detected. And the locking lever 49 may be prevented from rotating to the winding stop position.
[0066]
【The invention's effect】
As described above, in the photographic film according to the first aspect, since the pair of perforations for frame advance control are arranged at a short interval from the rear end of the film, the shutter charge can be performed by the first film winding operation. Thus, it is possible to surely solve the problem that must be shipped in the state where the charging is completed.In addition, since the perforations on the film front end of the pair of perforations for frame feed control arranged at short intervals in the photo film are formed into large perforations that extend a certain size toward the film rear end, a commercially available photo film is used. It is possible to prevent unauthorized use by illegally refilling and using a photographic film in a film unit with a lens.
[0067]
In the invention of claim 2, since the lens-fitted film unit has a structure for detecting a pair of perforations for frame advance control at a predetermined position closer to the film roll chamber side than the photographing optical axis, film winding is performed in the manufacturing process. Then, the shutter release is performed and the operation of the shutter mechanism is inspected, so that the prescribed number of images can be taken. According to the third aspect of the present invention, since the pair of perforations for frame advance control is detected at a predetermined position nearer to the film roll chamber side than the photographing optical axis, the pair of additional perforations is provided. Since the detection of the image is invalidated by the film winding means, it is possible to shoot as many as the prescribed number.
[0068]
Claim4In the described invention, since the film unit with a lens is configured to detect a pair of perforations for frame advance control at a predetermined position closer to the film roll chamber side than the photographing optical axis, when the first frame is set The frame number counter is displaced to the display position where the remaining number is 1, and the frame number counter is displaced to the display position indicating that there is no remaining number by winding the film after the first frame is shot. Can be displayed by counting the number of frames.
[0069]
Claim5In the described film unit with a lens, the frame number counter is displaced in conjunction with the rotation of the sprocket, and when the frame number counter is displaced by the number of frames to be photographed, the frame feed control is canceled and the most of the photographic film is A pair of perforations at the frontDetectionInvalidationInTherefore, you can shoot only the specified number of photosDobe able to.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a photographic film cartridge according to the present invention, showing a state as viewed from the emulsion surface side of a photographic film.
FIG. 2 is a perspective view showing an appearance of a lens-fitted photo film unit according to the present invention.
FIG. 3 is an exploded perspective view showing a configuration of a unit main body.
FIG. 4 is an exploded perspective view showing a film winding mechanism, a film winding stop mechanism, a shutter mechanism, and a film counter mechanism.
5A is a front view of a photographic film set at an exposure aperture as viewed from the photographic lens side, and FIG. 5B is a plan view of an intermittent sprocket engaged with the photographic film as viewed from above. .
FIG. 6 is an explanatory view showing a photographic film of another example in which perforations of different sizes are formed as seen from the emulsion surface side.
7 (A) shows the main part of a pair of perforations having the size described in FIG. 6, and FIG. 7 (B) is an explanatory view showing an intermittent sprocket that engages with the pair of perforations. .
FIG. 8 is an exploded perspective view showing an embodiment in which a pair of perforations for frame advance control is detected at a predetermined position closer to the film roll chamber side than the photographing optical axis.
9 is an exploded perspective view showing the mechanism of the main part of the exposure unit shown in FIG. 8. FIG.
10A is a front view of a photographic film set at an exposure aperture as viewed from the photographic lens side, and FIG. 10B is a state where the intermittent sprocket described in FIG. 9 is engaged with perforation of the photographic film. The top view seen from the top is shown.
[Explanation of symbols]
11 Spool
13,70 photo film
14, 16, 17, 72, 73, 74 perforation
52,80 Intermittent sprocket

Claims (5)

Cartridge rear end is engaged with a spool incorporated in, from the distal end side, a pair of perforations photographic frame number of sequences for each one frame feeding length of ordered frame advance control at short intervals, and the rear end provided with a pair of additional perforations in correspondence with the end of the last frame from the distal end side of the perforation of the pair of perforations corresponding to the last frame of the side in one frame feeding length away toward the rear end, the A photographic film characterized in that the perforation on the front end side of the pair of additional perforations is a large perforation obtained by extending a certain size toward the rear end side . A pair of perforations for frame advance control arranged at short intervals from the front end side are arranged by the number of frames taken for each frame feed length, and the front end of the pair of perforations corresponding to the last frame on the rear end side A photo film provided with a pair of additional perforations at the same interval as the pair of perforations corresponding to the end of the last frame at a position separated by one frame feed length from the side perforation toward the rear end side, with the exposure opening interposed therebetween On the other hand, it is pulled out from the cartridge loaded in the cartridge storage chamber provided on the one side, stored in the film roll chamber provided on the other side in the form of a roll, and from the last frame while sending the photographic film from the film roll chamber toward the cartridge. performs shooting sequentially, given that closer to the film roll chamber side than the photographing optical axis passing through the exposure opening A method of manufacturing a film unit having a film winding stop means having a sprocket arranged on the location,
A step of loading a photographic film, a film winding after the photographic film is loaded, detecting that the pair of additional perforations have moved to the predetermined position by the film winding means, and With a lens comprising: a step of setting a previous non-photographing frame in an exposure aperture; and a step of performing shutter release after the non-photographing frame is set in the exposure aperture and performing an operation check of a shutter mechanism Film unit manufacturing method. A pair of perforations for frame advance control arranged at short intervals from the front end side are arranged for the number of frames taken for each frame feed length, and the front end of the pair of perforations corresponding to the last frame on the rear end side A photo film provided with a pair of additional perforations at the same interval as the pair of perforations corresponding to the end of the last frame at a position separated by one frame feeding length from the side perforation toward the rear end side, with the exposure opening interposed therebetween On the other hand, it is pulled out from the cartridge loaded in the cartridge storage chamber provided on the one side, stored in the film roll chamber provided on the other side in the form of a roll, and from the last frame while sending the photographic film from the film roll chamber toward the cartridge. A film unit with a lens that shoots in order,
A sprocket is arranged at a predetermined position closer to the film roll chamber side than the photographing optical axis passing through the exposure aperture, and it is detected that the pair of additional perforations sent by the first film winding has moved to the predetermined position. A film unit with a lens, comprising film winding means for invalidating film winding and sometimes performing film winding by a pair of perforations sent by subsequent film winding . A frame number counter that displaces in conjunction with the rotation of the sprocket is provided, and the frame counter sets the first frame at the exposure opening by engaging the sprocket with a pair of perforations on the most distal side of the photographic film. When the frame advance control is completed, the position is shifted to the display position indicating that the remaining number of shots is 1, and the most front side of the photographic film transferred by winding the film after completing the shooting of the first frame 4. The lens-fitted photo film unit according to claim 3, wherein when the sprocket is rotated by a pair of perforations, the display unit is displaced to a display position indicating that there is no remaining number of shots. The rear end is locked to the spool incorporated in the cartridge, and a pair of frame-for-frame control perforations arranged at short intervals from the front end side are arranged for the number of frames taken for each frame feed length, and the rear end The pair of perforations corresponding to the last frame on the side of the pair of perforations at the same distance as the pair of perforations corresponding to the end of the last frame at a position one frame feeding length away from the perforation on the front end side toward the rear end side A photographic film with additional perforation is incorporated with the cartridge at the time of manufacture, and the exposed photographic film is stored in the patrone storage chamber on one side across the exposure opening and unexposed from the film roll chamber on the other side. Film unit with lens for taking pictures from the last frame to the first frame while pulling out the photo film There,
A pair of teeth that are sequentially engaged with the pair of perforations at a predetermined position closer to the film roll chamber side than the photographing optical axis passing through the exposure aperture; One of the teeth is engaged with one of the pair of perforations, and the pair of teeth is engaged with the pair of perforations sent by the subsequent film winding operation. Film winding means with intermittent sprockets slipping between,
The number of frames that are displaced in conjunction with the rotation of the intermittent sprocket while detecting that the intermittent sprocket has rotated following the movement of a pair of additional perforations on the most rear end side of the photographic film. A counter,
Frame advance control that disables detection of the pair of perforations at the foremost side of a photographic film by preventing the film anti-winding means from being locked when the frame number counter is displaced by the number of frames taken film unit, characterized in that it comprises a means.

Images